Rock.
The Earth itself is.
Rock, soil, etc.
electromagnetic waves are wave that do not require a material medium for their propagation while mechanical wave requires a material medium for example light wave is an electromagnetic wave it does not require any material medium(depends on air or water)for their propagation i.e even in the absence of air light will still travel... sound wave is a mechanical wave because sound do not travel in a vacuum....
A wave is a repeating disturbance in a medium, characterized by the propagation of energy without the physical transportation of matter. Waves can take various forms, such as sound waves, light waves, and water waves, and they exhibit properties like frequency, amplitude, and wavelength.
Because sound waves are mechanical vibrations of material matter. You can't have sound waves in a space where there's no material to vibrate.
The Earth itself is.
Mechanical waves require a medium for their propagation whereas electromagnetic waves require a medium for their propagation.
Earth is the medium for earthquake waves.
Electromagnetic waves, such as light and radio waves, do not require a material medium for their propagation. They can travel through a vacuum because they are created by oscillating electric and magnetic fields. This is in contrast to mechanical waves, like sound waves, which require a medium such as air or water to propagate.
A Sound wave, water wave, earth quake wave. Electromagnetic waves (radio, light, etc.) do not require a medium for propagation.
The propagation of light waves in a vacuum is the movement of light waves through empty space. In physics, propagation refers to the transmission or spread of waves or energy through a medium. In this context, the propagation of light waves in a vacuum demonstrates the fundamental concept of how waves can travel through space without the need for a material medium.
Rock, soil, etc.
Mechanical waves
Sound waves: These are mechanical waves that require a medium (such as air, water, or a solid material) for propagation. Water waves: Also known as surface waves, they are a type of mechanical wave that travels through a medium (such as water). Seismic waves: These are waves that are generated by earthquakes and require a medium, such as the Earth's crust and mantle, for propagation.
In a way, they don't. There is always a medium; though for some waves, this medium can be empty space.
Propagation of disturbance suffered by a particle in a medium is called wave propagation Wave Propagation is a term used to estimate the actions and characteristics of a wave of motion either in solids, liquids, gasses, or electrical radio type waves by the environment it is in and what factors affect those waves behaviors.
Electromagnetic waves (like light) don't require a medium for propagation, unlike mechanic waves (like sound).